German version had cartoon-like sound effects added to the soundtrack in the fight scenes.
In the theatrical release, the first fight scene when the turtles first come in was slightly longer. On further home video releases, for some strange reason, it was shortened.
The depiction of chainsticks on screen was rarely allowed in the UK back in the early 90's, so the movie was heavily cut or reframed to remove every last trace of them. However it has since be shown uncut on UK TV and was passed uncut by the BBFC for it's 2002 DVD release.
In the DVD release and on Netflix, the line, "Hey, Leo!" spoken by Michelangelo as he is being swung in circles by Rahzar is muted. It is present in the theatrical and VHS releases. This line does, however, appear on the subtitles.